A < a href="http://www.selfridges.com/en/riedel/?rd=riedel"style="text-decoration: none"><font color="black"><b>Riedel</b></font></a><b> glass</b> turns a sip of wine into a celebration, with each glass working best with different wines made from specific types of grapes. This twin-pack from the Big O Wine Tumbler collection works particularly well with Cabernet grapes.